<template>
  <div class="popupSelect-container">
    <div class="el-select" @click.stop="openDialog">
      <div class="el-select__tags" v-if="multiple" ref="tags" :style="{ 'max-width': inputWidth - 32 + 'px', width: '100%',cursor:'pointer' }">
        <span v-if="collapseTags && tagsList.length">
          <el-tag :closable="!selectDisabled" :size="collapseTagSize" type="info" @close="deleteTag($event, 0)" disable-transitions>
            <span class="el-select__tags-text">{{ tagsList[0].fullName }}</span>
          </el-tag>
          <el-tag v-if="tagsList.length > 1" :closable="false" type="info" disable-transitions>
            <span class="el-select__tags-text">+ {{ tagsList.length - 1 }}</span>
          </el-tag>
        </span>
        <transition-group @after-leave="resetInputHeight" v-if="!collapseTags">
          <el-tag v-for="(item,i) in tagsList" :key="item.id" :size="collapseTagSize" :closable="!selectDisabled" type="info" @close="deleteTag($event, i)" disable-transitions>
            <span class="el-select__tags-text">{{ item.fullName }}</span>
          </el-tag>
        </transition-group>
      </div>
      <el-input ref="reference" v-model="innerValue" type="text" :placeholder="currentPlaceholder" :disabled="selectDisabled" readonly :validate-event="false" :tabindex="(multiple) ? '-1' : null" @mouseenter.native="inputHovering = true" @mouseleave.native="inputHovering = false">
        <template slot="suffix">
          <i v-show="!showClose" :class="['el-select__caret', 'el-input__icon', 'el-icon-arrow-up']"></i>
          <i v-if="showClose" class="el-select__caret el-input__icon el-icon-circle-close" @click="handleClearClick"></i>
        </template>
      </el-input>
    </div>
    <el-dialog :title="title" :close-on-click-modal="false" :visible.sync="visible" class="JNPF-dialog JNPF-dialog_center transfer-dialog" lock-scroll append-to-body width="800px" :modal-append-to-body="false" @close="onClose">
      <div class="transfer__body">
        <div class="transfer-pane">
          <div class="transfer-pane__tools">
            <el-input placeholder="请输入关键词查询" v-model="pagination.keyword" @keyup.enter.native="search" clearable class="search-input">
              <el-button slot="append" icon="el-icon-search" @click="search"></el-button>
            </el-input>
          </div>
          <div class="transfer-pane__body left-pane">
            <el-tabs v-model="activeName" class="transfer-pane__body-tab" :class="{'hasSys-tab':hasSys}" v-if="selectType==='all'">
              <el-tab-pane label="全部数据" name="all">
                <el-tree :data="treeData" :props="props" check-on-click-node @node-click="handleNodeClick" class="JNPF-common-el-tree" node-key="id" v-loading="loading" lazy :load="loadNode" v-if="!isAsync" :default-expanded-keys="defaultExpandedKeys">
                  <span class="custom-tree-node" slot-scope="{ node, data }" :title="node.label">
                    <i :class="data.icon"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
                <div class="single-list" ref="infiniteBody" v-if="isAsync" v-loading="loading && pagination.currentPage==1">
                  <template v-if="treeData.length">
                    <div v-for="(item,index) in treeData" :key="index" class="selected-item-user" @click="handleNodeClick(item)">
                      <div class="selected-item-main">
                        <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                        </el-avatar>
                        <div class="selected-item-text">
                          <p class="name">{{item.fullName}}</p>
                          <p class="organize" :title="item.organize">{{item.organize}}</p>
                        </div>
                      </div>
                    </div>
                  </template>
                  <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
                </div>
              </el-tab-pane>
              <el-tab-pane label="当前组织" name="department">
                <div class="single-list" v-loading="loading">
                  <template v-if="treeData2.length">
                    <div v-for="(item,index) in treeData2" :key="index" class="selected-item-user" @click="handleNodeClick2(item)">
                      <div class="selected-item-main">
                        <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                        </el-avatar>
                        <div class="selected-item-text">
                          <p class="name">{{item.fullName}}</p>
                          <p class="organize" :title="item.organize">{{item.organize}}</p>
                        </div>
                      </div>
                    </div>
                  </template>
                  <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
                </div>
              </el-tab-pane>
              <el-tab-pane label="我的下属" name="subordinates">
                <div class="single-list" v-loading="loading">
                  <template v-if="treeData3.length">
                    <div v-for="(item,index) in treeData3" :key="index" class="selected-item-user" @click="handleNodeClick2(item)">
                      <div class="selected-item-main">
                        <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                        </el-avatar>
                        <div class="selected-item-text">
                          <p class="name">{{item.fullName}}</p>
                          <p class="organize" :title="item.organize">{{item.organize}}</p>
                        </div>
                      </div>
                    </div>
                  </template>
                  <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
                </div>
              </el-tab-pane>
              <el-tab-pane label="系统变量" name="system">
                <el-tree :data="treeData4" :props="props" :expand-on-click-node="false" check-on-click-node @node-click="handleNodeClick2" class="JNPF-common-el-tree" node-key="id" v-loading="loading">
                  <span class="custom-tree-node" slot-scope="{ node }" :title="node.label">
                    <i class="icon-ym icon-ym-tree-user2"></i>
                    <span class="text">{{node.label}}</span>
                  </span>
                </el-tree>
              </el-tab-pane>
            </el-tabs>
            <template v-else>
              <div class="custom-title">全部数据</div>
              <div class="single-list" ref="infiniteBody">
                <template v-if="ableList.length">
                  <div v-for="(item,index) in ableList" :key="index" class="selected-item-user" @click="handleNodeClick2(item)">
                    <div class="selected-item-main">
                      <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                      </el-avatar>
                      <div class="selected-item-text">
                        <p class="name">{{item.fullName}}</p>
                        <p class="organize" :title="item.organize">{{item.organize}}</p>
                      </div>
                    </div>
                  </div>
                </template>
                <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
              </div>
            </template>
          </div>
        </div>
        <div class="transfer-pane">
          <div class="transfer-pane__tools">
            <span>已选</span>
            <el-button @click="removeAll" type="text" class="removeAllBtn">清空列表</el-button>
          </div>
          <div class="transfer-pane__body shadow right-pane">
            <template v-if="selectedData.length">
              <div v-for="(item,index) in selectedData" :key="index" class="selected-item-user">
                <div class="selected-item-main">
                  <el-avatar :size="36" :src="define.comUrl+item.headIcon" class="selected-item-headIcon">
                  </el-avatar>
                  <div class="selected-item-text">
                    <p class="name">{{item.fullName}}</p>
                    <p class="organize" :title="item.organize">{{item.organize}}</p>
                  </div>
                  <i class="el-icon-delete" @click="removeData(index)"></i>
                </div>
              </div>
            </template>
            <el-empty description="暂无数据" :image-size="120" v-else></el-empty>
          </div>
        </div>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setDefault(),visible=false">{{$t('common.cancelButton')}}</el-button>
        <el-button type="primary" @click="confirm">{{$t('common.confirmButton')}}</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  import { getImUserSelector, getUserInfoList, getSubordinates, getOrganization, getSelectedUserList } from '@/api/permission/user';
  import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event';
  import emitter from 'element-ui/src/mixins/emitter';
  let { methods: { dispatch } } = emitter
  export default {
    name: 'JnpfUserSelect',
    inject: {
      elForm: {
        default: ''
      },
      elFormItem: {
        default: ''
      }
    },
    props: {
      value: {
        type: [String, Array],
        default: ''
      },
      placeholder: {
        type: String,
        default: '请选择'
      },
      title: {
        type: String,
        default: '选择用户'
      },
      disabled: {
        type: Boolean,
        default: false
      },
      multiple: {
        type: Boolean,
        default: false
      },
      collapseTags: {
        type: Boolean,
        default: false
      },
      clearable: {
        type: Boolean,
        default: true
      },
      hasSys: {
        type: Boolean,
        default: false
      },
      selectType: {
        type: String,
        default: 'all'
      },
      ableRelationIds: {
        type: [Array, String],
        default: () => []
      },
      ableIds: {
        type: Array,
        default: () => []
      },
      size: String,
    },
    data() {
      return {
        visible: false,
        activeName: '',
        nodeId: '',
        innerValue: '',
        loading: false,
        props: {
          children: 'children',
          label: 'fullName',
          isLeaf: 'isLeaf'
        },
        defaultExpandedKeys: [],
        treeData: [],
        treeData2: [],
        treeData3: [],
        treeData4: [{
          id: 'currentUser',
          fullName: '当前用户',
          headIcon: '/api/file/Image/userAvatar/001.png'
        }],
        ableList: [],
        selectedData: [],
        tagsList: [],
        inputHovering: false,
        inputWidth: 0,
        initialInputHeight: 0,
        isAsync: false,
        finish: false,
        pagination: {
          keyword: '',
          currentPage: 1,
          pageSize: 20,
        },
        ableQuery: {
          ids: [],
        }
      }
    },
    watch: {
      value(val) {
        this.setDefault()
      },
      selectDisabled() {
        this.$nextTick(() => {
          this.resetInputHeight();
        });
      },
      activeName(val) {
        this.pagination.keyword = ''
        this.isAsync = false
        if (!val) return
        this.nodeId = '0'
        this.treeData = []
        this.treeData2 = []
        this.treeData3 = []
        this.getData()
      }
    },
    computed: {
      showClose() {
        let hasValue = this.multiple
          ? Array.isArray(this.value) && this.value.length > 0
          : this.value !== undefined && this.value !== null && this.value !== '';
        let criteria = this.clearable &&
          !this.selectDisabled &&
          this.inputHovering &&
          hasValue;
        return criteria;
      },
      currentPlaceholder() {
        if (this.multiple && Array.isArray(this.value) && this.value.length) {
          return ''
        } else {
          return this.placeholder
        }
      },
      selectDisabled() {
        return this.disabled || (this.elForm || {}).disabled;
      },
      _elFormItemSize() {
        return (this.elFormItem || {}).elFormItemSize;
      },
      selectSize() {
        return this.size || this._elFormItemSize || (this.$ELEMENT || {}).size;
      },
      collapseTagSize() {
        return ['small', 'mini'].indexOf(this.selectSize) > -1
          ? 'mini'
          : 'small';
      },
    },
    created() {
      this.setDefault()
    },
    mounted() {
      addResizeListener(this.$el, this.handleResize);
      const reference = this.$refs.reference;
      if (reference && reference.$el) {
        const sizeMap = {
          medium: 36,
          small: 32,
          mini: 28
        };
        const input = reference.$el.querySelector('input');
        this.initialInputHeight = input.getBoundingClientRect().height || sizeMap[this.selectSize];
      }
      if (this.multiple) {
        this.resetInputHeight();
      }
      this.$nextTick(() => {
        if (reference && reference.$el) {
          this.inputWidth = reference.$el.getBoundingClientRect().width;
        }
      });
      this.setDefault()
    },
    beforeDestroy() {
      if (this.$el && this.handleResize) removeResizeListener(this.$el, this.handleResize);
    },
    methods: {
      getAbleList() {
        this.loading = true
        let query = {
          pagination: this.pagination,
          ...this.ableQuery
        }
        getSelectedUserList(query).then(res => {
          if (res.data.list.length < this.pagination.pageSize) {
            this.finish = true
          }
          this.ableList = [...this.ableList, ...res.data.list]
          this.loading = false
        }).catch(() => {
          this.loading = false
        })
      },
      bindScroll() {
        let _this = this,
          vBody = _this.$refs.infiniteBody;
        vBody.addEventListener("scroll", function () {
          if (vBody.scrollHeight - vBody.clientHeight - vBody.scrollTop <= 200 && !_this.loading && !_this.finish) {
            _this.pagination.currentPage += 1
            if (_this.selectType === 'all') {
              _this.getAllList()
            } else {
              _this.getAbleList()
            }
          }
        });
      },
      onClose() {
        this.activeName = ''
      },
      openDialog() {
        if (this.selectDisabled) return
        this.visible = true
        this.pagination.keyword = ''
        this.nodeId = '0'
        this.isAsync = false
        this.finish = false
        this.selectedData = []
        if (this.selectType === 'all') {
          this.activeName = 'all'
          this.setDefault()
        } else {
          if (this.selectType === 'custom') {
            this.ableQuery = {
              ids: this.ableIds,
            }
          } else {
            const suffix = '--' + this.getAbleKey(this.selectType);
            let ableIds = !this.ableRelationIds ? [] : Array.isArray(this.ableRelationIds) ? this.ableRelationIds : [this.ableRelationIds];
            this.ableQuery.ids = ableIds.map(o => o + suffix);
          }
          this.getData()
          this.$nextTick(() => {
            this.bindScroll()
            this.setDefault()
          })
        }
      },
      getAbleKey(selectType) {
        if (selectType === 'dep') return 'department';
        if (selectType === 'pos') return 'position';
        return selectType;
      },
      confirm() {
        if (this.multiple) {
          this.innerValue = ''
          this.tagsList = JSON.parse(JSON.stringify(this.selectedData))
          let selectedIds = this.selectedData.map(o => o.id)
          this.$emit('input', selectedIds)
          this.$emit('change', selectedIds, this.selectedData)
          dispatch.call(this, 'ElFormItem', 'el.form.change', selectedIds)
        } else {
          if (!this.selectedData.length) {
            this.innerValue = ''
            this.$emit('input', '')
            this.$emit('change', '', {})
            dispatch.call(this, 'ElFormItem', 'el.form.change', '')
            this.visible = false
            return
          }
          this.innerValue = this.selectedData[0].fullName
          let selectedIds = this.selectedData.map(o => o.id)
          this.$emit('input', selectedIds[0])
          this.$emit('change', selectedIds[0], this.selectedData[0])
          dispatch.call(this, 'ElFormItem', 'el.form.change', selectedIds[0])
        }
        this.visible = false
      },
      setDefault() {
        if (!this.value || !this.value.length) {
          this.innerValue = ''
          this.selectedData = []
          this.tagsList = []
          this.$nextTick(() => {
            this.resetInputHeight();
          })
          return
        }
        const arr = this.multiple ? this.value : [this.value]
        const hasSysItem = Array.isArray(arr) ? arr.some(o => o === 'currentUser') : false;
        getUserInfoList(arr).then(res => {
          this.selectedData = res.data.list
          if (hasSysItem) {
            this.selectedData.push({
              id: 'currentUser',
              fullName: '当前用户',
              headIcon: '/api/file/Image/userAvatar/001.png'
            })
          }
          if (this.multiple) {
            this.innerValue = ''
            this.tagsList = JSON.parse(JSON.stringify(this.selectedData))
          } else {
            this.innerValue = this.selectedData.length ? this.selectedData[0].fullName : ''
          }
          this.$nextTick(() => {
            if (this.multiple) {
              this.resetInputHeight();
            }
          });
        })
      },
      getData() {
        if (this.selectType === 'all') {
          if (this.activeName === 'all') {
            this.getAllList()
          } else if (this.activeName === 'department') {
            this.loading = true
            getOrganization({ keyword: this.pagination.keyword, organizeId: '0' }).then(res => {
              this.treeData2 = res.data
              this.loading = false
            })
          } else if (this.activeName === 'subordinates') {
            this.loading = true
            getSubordinates(this.pagination.keyword).then(res => {
              this.treeData3 = res.data
              this.loading = false
            })
          } else {
            this.loading = false
          }
        } else {
          this.pagination.currentPage = 1
          this.finish = false
          this.ableList = []
          this.getAbleList()
        }
      },
      search() {
        this.nodeId = '0'
        this.treeData = []
        this.pagination.currentPage = 1
        this.isAsync = !!this.pagination.keyword
        this.finish = false
        if (this.isAsync && this.activeName === 'all') {
          this.$nextTick(() => {
            this.bindScroll()
          })
        }
        if (this.selectType === 'all') {
          this.getData()
        } else {
          this.ableList = []
          this.getAbleList()
        }
      },
      getAllList() {
        this.loading = true
        if (this.pagination.keyword) this.nodeId = '0'
        getImUserSelector(this.nodeId, this.pagination).then(res => {
          if (this.pagination.keyword) {
            if (res.data.list.length < this.pagination.pageSize) {
              this.finish = true
            }
            this.treeData = [...this.treeData, ...res.data.list]
          } else {
            this.treeData = res.data.list
          }
          this.loading = false
          if (!this.pagination.keyword && this.treeData.length && this.nodeId == '0') {
            this.defaultExpandedKeys = [this.treeData[0].id]
          }
        })
      },
      loadNode(node, resolve) {
        if (this.visible === false) return []
        if (node.level === 0) {
          this.nodeId = '0'
          return resolve(this.treeData)
        }
        this.nodeId = node.data.id
        getImUserSelector(this.nodeId).then(res => {
          resolve(res.data.list)
        })
      },
      handleNodeClick(data) {
        if (data.type !== 'user') return
        this.handleNodeClick2(data)
      },
      handleNodeClick2(data) {
        const boo = this.selectedData.some(o => o.id === data.id)
        if (boo) return
        this.multiple ? this.selectedData.push(data) : this.selectedData = [data]
      },
      removeAll() {
        this.selectedData = []
      },
      removeData(index) {
        this.selectedData.splice(index, 1)
      },
      deleteTag(event, index) {
        this.selectedData.splice(index, 1)
        this.confirm()
        event.stopPropagation();
      },
      handleClearClick(event) {
        this.selectedData = []
        this.confirm()
        event.stopPropagation();
      },
      resetInputWidth() {
        this.inputWidth = this.$refs.reference.$el.getBoundingClientRect().width;
      },
      handleResize() {
        this.resetInputWidth();
        if (this.multiple) this.resetInputHeight();
      },
      resetInputHeight() {
        if (this.collapseTags) return;
        this.$nextTick(() => {
          if (!this.$refs.reference) return;
          let inputChildNodes = this.$refs.reference.$el.childNodes;
          let input = [].filter.call(inputChildNodes, item => item.tagName === 'INPUT')[0];
          const tags = this.$refs.tags;
          const tagsHeight = tags ? Math.round(tags.getBoundingClientRect().height) : 0;
          const sizeInMap = this.initialInputHeight || 40;
          input.style.height = this.selectedData.length === 0
            ? sizeInMap + 'px'
            : Math.max(
              tags ? (tagsHeight + (tagsHeight > sizeInMap ? 6 : 0)) : 0,
              sizeInMap
            ) + 'px';
        });
      },
      resetInputWidth() {
        this.inputWidth = this.$refs.reference.$el.getBoundingClientRect().width;
      },
      handleResize() {
        this.resetInputWidth();
        if (this.multiple) this.resetInputHeight();
      }
    },
  }
</script>